A 14-year U.S. study involving 1,685 middle-age adults found that those who regularly drank at least one can of sugary soda a day were 46 percent more likely to develop symptoms of prediabetes, including insulin resistance. Sugary beverages included colas and other carbonates, and non-carbonated fruit drinks (but not fruit juice) such as lemonade and fruit punch. The researchers said the risk of diabetes could be lowered substantially by a simple lifestyle change: replace sugary beverages with water or unsweetened coffee or tea.